491394713311 has 4 divisors (see below), whose sum is σ = 495902921800. Its totient is φ = 486886504824.

The previous prime is 491394713281. The next prime is 491394713387. The reversal of 491394713311 is 113317493194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491394713311 - 2¹³ = 491394705119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491394713011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254104081 + ... + 2254104298.

It is an arithmetic number, because the mean of its divisors is an integer number (123975730450).

Almost surely, 2^491394713311 is an apocalyptic number.

491394713311 is a deficient number, since it is larger than the sum of its proper divisors (4508208489).

491394713311 is a wasteful number, since it uses less digits than its factorization.

491394713311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508208488.

The product of its digits is 244944, while the sum is 46.

The spelling of 491394713311 in words is "four hundred ninety-one billion, three hundred ninety-four million, seven hundred thirteen thousand, three hundred eleven".